Swilliam w



(N0 Model.) 7

W. W. GRISGOM.

BEST AVAILABLE COP SYSTEM OF ELECTRIC LIGHTING.

Patented Dec. 4

fir;

N. PETER. HmoLkho rmlur. WW 0. c.

tion, m.

evel-y other bran paint-11s that no i BESTYAVAILABLE- COP f'fTt-VILLIAM G niscon, on HAY-ERFORD vCOLLEGE,- AS$IGKOR 'ro tr'nr:

* EiiEorno'" YNA ICicoiirAn'r or FHILADELPI-UA, or inm rnnrrrna, rnzgnsnvmm pSY'STEM os-ereormfoj Lie crime-.- I,

.': sPEomdA'r'1on fo ming m of Letters Patent no; 393,756, dated December 4, isse.

rented certain; new and usefulImprovement-s in Electric Lighting,

a specification.

, lily intention is an improvement-in electric fighting. The objectof nu -invention is-to prov de for rapidlyiincluding ainieasni'ing-instrnntent in differenthranches o 'tai'ning translating de\'icessuch as la1nps sothat adirect comparison between different in-anchesot 1he circuit cXisP-that is, before the the same conditions mmditions attending observation ofeac-h and to change I take an in: from onethis pin-pose 'I use a- Figure 1 is a View 0 v I said. ll :are a series of multiple-arc the ln-anchcircuit1Q. 1 branches, 17 18 15) 20',- each branch extendrepeated with regard to "ingto aidifierent locality-and circuit of'a series of lamps terminals connected of a rotating disk, of

two concentric sections, m and n, insulated outspark or interruption. from each other. The portion it forms a ring ll gait I claim, and desire to having a sector insulated therefrom, but elec tors] atent, lS-

'trically connected to Fig. 2. There l-i'phom it, may concern.- ;;B e. jtknon'tn that L WILLIAM W. a eit-izenof the-United States,

lll'ell'llptlOll occuis in passbranch to another. se me ineasuruig-instriuncut in each a sad case. in the combination of a sectional i ino, feeding. in

" he secondary batt A red or arbor, g, center of the disk and has base, ot' insulating material, f,

are two spring-con lpplicatiiin inn my ima e.- Seriallio, 279,922; Iota mm Gnisoon,

of these spring-fingem, and a resident.

contact with the "ofifi'a tjeriord College, in'the county of )lontside or surface. 'gomeliyland' State of Pennsylva-nia, have inmakes electrical contact The. spring-fingers :r, ofuhich the following 16, including the coils the disk n. if an, electric circuit conmay, he. mad e while the first test have time.

and I so arrange my ap ings,;riamain lead i3 use the a ppa-rm as for improved form now desire to introduce new and circuits 1? 1 finger 6. Circuit is now (r, 16, 15, war, (I, branch lead 1.. The annneter the branch 20. inghere, onto finger c,

by reference to the of thc'complcte imAallaiew of the switch.

ain conductor' 1 completing the and 17. translating devices, as ery B-has its to the main leads-l and It consists conducting material, in

the circular interior por-" passes through the cal istrihiition, of

bearings in the main circuit havinga as'sliown in' and " 'lherare aseries of spring-fingers,

fixed at. one end to the base-boardf, and hat ing their free ends in contact 8 .19 2O successively. i'o're rotate the disk on lated proj eciing section of -m rests upon, say, via main lead 2, 0, 21,

ing-inst'ru nent,- and I ma y-,; bearing up'onilie surfaces oi the (Lisa. one

an, makes electrical portion n. upon thejnnder The other spring-finger, y;

with the portion 'm'.

p and 'y are connected to the-terminals of a fragment of conductor 15' of an an nieter, A;

ditlicrent doors in a d raw- Y spring finger e, diskscction n, fingers a l) (1 (I, lead 1. 'lheannnetcr A is out. of circuit.

lamps l and main 0 (-r A into '0 there- 02- until the. insuihc annnct 20, lamps L to main A is now included in As soon as we can we rotate the insulated section of nand the anuneter is included in take a read- 'a be (I e,-

60. 'With the rim of One of these fingers, e, t'orins one terminal of the main lead :2. spring-fingers form the terminals, rcspective- 1 of the series of multiple-arc branches 1? .18 if! I cachof which branches includesin itscircuitascrics of lamps, each series being iu a ,sepa-rate locality-as house or different Mocks in a street.

Normally circuit is, as shown in the The remaining he same operation is circuit bran ches 18 In this way reading can be rapidly taken from each hranc'lrcireuit insuccession by one and the same ai'nnieter I thus av id the expense of duplicate ments and gain the advantage that each-test or indiliation is taken from the same nieasun measuring instuke the changes \l'lfll secure 1; Let- The combination, in'a system of electrh. a source of electric-h yaseriesof branches, trans .lsting defines in eaelijlii aneh, and a switch 'circu%- }1 anger i si fin oitwo movable I00 terniil zt-ls ol' main-linkc-ontatforming the terminal of one main lead,

contacts insulated l'ronr unuh other, two-fixed contacts forming the terminals of a meawrwith the two mmjable c011tnts,'respvctively,

:t sci-it's of fixeifl contacts respect i\ el forn'ting branches, amla fixed all arranged .a'nilginwratingsubstantially as described.

hug-instrumentnormally resting Kin Contact .pusitioit to make cont-act with either with 01-, ciremit-Changer, 11h: con -f hination of a composite rotating disk (Dillposeclof two concentric sections at condueting material insulated .fmn'raeh other, a sog- BEST AVAILABLE COP mom ut ineonteiasec-tion insulated tln-n-t'rmn and (*lctricall' connected to the inner sect ion of the dislgn series 01 spring-fingers fixed in ofthc disk, according to the radial position of the. insulated sg'mnt, and a spring-cont alct n'taking permanent connection with (m1- of said sctinns.

W. W 'GRISU )lYl.

\Vitmrsscsz,

DAI\"IEL E. DELAYAN, THOMAS PETERS (,'().\'A w. 

